Wood-pulp grinder



Jan. 7, 1930. F. B. CHAFPELL WOOD PULP GRINDER Filed March 9. 1925 dz Away A Patented Jan. 7, 1930 a 1 UNITED, STATES PATENT OFFICE FRED B. CHAPPELL, OF'GLENS FALLS, NEW YORK, ASSIGNOR or ONE-HALF To areas FALLS MACHINE WORKS, OF GLENS FALLS, NEW YORK, A CORPORATION OF NEW YORK; ANNIE MAE CHAPIELL AND WILLIAM T. COWLES EXECUIORS OF FRED B.

CHAPPELL, DECEASED WOOD-PULP GRINDER Application filed March 9, 1925. Serial No. 14,065.

gers become worn, they can be replaced, thereby saving the expense of renewing the whole pocket. a f

Other and further object of the invention is to provide a pocket with novel means for holding the fingers in their proper position so that the pocket can be adjusted in respect to the grindstone in the usual manner, the fingers being so positioned that they will act to prevent the large slivers from passing throug and yet allowing the pulp to pass freely through the fingers;

Other and further objects and advantages of the invention will be hereinafter set forth and the novel features thereof defined by the appended claims.

In the drawings,

Figure 1 is an elevation, partly in section, of the upper portion of a wood pulp grinder;

Figure 2 is a vertical section partly in elevation of one of the pockets; V

Figure 3 is a detail vertical section of the pocket;

Figure 4 is a top plan view of a portion of one of the removable finger frames; and

Figure 5 is an elevation of the same.

In the drawings 1 indicates a housing in which is mounted a rotary grindstone 2. Disposed above the housingin a radial manner are pockets 3 into which the wood to be ground is placed and forced against the stone in the ordinary manner and these pockets are provided with a depending apron 4 which is adjustably mounted on the housing 1 by bolts 5. In constructing the pocket in accordance with my invention, instead of forming the lower edges of the pocket serrated, I provide'a cast steel frame 6 having a serrated edge and which I have termed a finger frame which is adapted to be secured in the lower edge of the pocket by bolts 01' other suitable means against a shoulder 7.

a In Figure 1 I have shown a transverse sec pockets being engag ng the cross bars of said finger frame.

tion through a pocket with the finger frame in position in order to illustrate the position of the fingers in respect to the grindstone.

The finger frame is composed of longitudinal side bars connected together adjacent their ends by cross bars, the lower edges. of the cross bars and side bars being serrated to form the fingers and the upper edges of the longitudinal bars are rabbeted as shown at I 8 which are adapted to interlock with the rabbeted lower edges 9 of the side walls of the pocket in such a manner that the finger frame can be secured rigidly in position within the pocket so that the pocket can be adjusted towards and away from the grindstone.

In use the operator of a wood pulp grindpockets towards and away from the grindstone and it often happens that the pockets are adjusted so as to bring the fingers in con. tact with the grindstone which of course, wears the fingers away and if this happens several times, it is necessary to replace, the entire pocket so that the fingers will be of sufficient length to provide a clearance for the wood pulp and a guard for the large. slivers, while with my improved construction of removable fingers, I am able to remove the finger frame and substitute a new one in the pocket, thereby savingthe expense of renewing the entire pocket.

From the foregoing description it will be seen'that I have provided a pocket for wood pulp grinders formed with a detachable finger frame rigidly secured within the pocket so that it is moved with the pocket as it is adj usted in respect to the grindstone.

What I claim is:

1. A wood pulp grinder having a series of radially disposed pockets and means for adj usting said pockets in respect to the grindstone of said grinder, the side edges of said pockets being rabbeted and a rectangular frame having rabbeted side bars interlocked with the rabbeted edges of said pockets, said provided with shoulders for r 2. A pocket for wood pulp grinders having depending aprons at its ends and provided with internal shoulders, the side edges of said ring machine of this character adjusts the j pockets being rabbeted, a finger frame comprising longitudinally disposed side bars connected together by cross bars adjacent each end, the side bars of said frame bein rabbeted and adapted to cooperate with the rabbeted sides of said pockets.

In testimony whereof I hereunto afiix my signature.

FRED B. CHAPPELL. 

